use multi downloader

.idea/workspace.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="BookmarkManager">
-    <bookmark url="file://$PROJECT_DIR$/src/routes/upload.ts" line="23" />
+    <bookmark url="file://$PROJECT_DIR$/src/routes/upload.ts" line="18" />
   </component>
   <component name="ChangeListManager">
     <list default="true" id="f0cbce64-0ebc-4f60-8c2d-2fe9e214a8c0" name="Default" comment="">
@@ -65,8 +65,8 @@
       <file leaf-file-name="upload.ts" pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/src/routes/upload.ts">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="229">
-              <caret line="197" column="62" lean-forward="false" selection-start-line="197" selection-start-column="62" selection-end-line="197" selection-end-column="62" />
+            <state relative-caret-position="308">
+              <caret line="156" column="0" lean-forward="true" selection-start-line="156" selection-start-column="0" selection-end-line="156" selection-end-column="0" />
               <folding>
                 <element signature="e#0#28#0" expanded="true" />
               </folding>
@@ -409,12 +409,12 @@
       <workItem from="1493198225466" duration="47067000" />
       <workItem from="1493371982129" duration="6000" />
       <workItem from="1493372010655" duration="3472000" />
-      <workItem from="1493692283332" duration="16280000" />
+      <workItem from="1493692283332" duration="16349000" />
     </task>
     <servers />
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="218051000" />
+    <option name="totallyTimeSpent" value="218120000" />
   </component>
   <component name="TodoView">
     <todo-panel id="selected-file">
@@ -844,8 +844,8 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/src/routes/upload.ts">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="229">
-          <caret line="197" column="62" lean-forward="false" selection-start-line="197" selection-start-column="62" selection-end-line="197" selection-end-column="62" />
+        <state relative-caret-position="308">
+          <caret line="156" column="0" lean-forward="true" selection-start-line="156" selection-start-column="0" selection-end-line="156" selection-end-column="0" />
           <folding>
             <element signature="e#0#28#0" expanded="true" />
           </folding>

src/routes/upload.ts

@@ -12,13 +12,8 @@ import {mongodb} from '../models/Iridium';
 import {toObjectID} from 'iridium';
 import config from '../../config';
 import {UploadOSS} from '../utils';
-import Queue from '../serives/Queue';
 import Router = require('koa-router');
 
-const downloader = new Aria2;
-let DownloadQueue = new Queue;
-downloader.open();
-
 const checkFilePath = async (file) => {
   if (['.gz', '.rar', '.zip', '.7z'].indexOf(path.extname(file.path)) === -1) {
     console.log(file);
@@ -152,12 +147,16 @@ const uploadPackageUrl = async (ctx: Context) => {
     ctx.throw(400, 'params error');
   }
   // testUrl: https://r.my-card.in/release/dist/0c16a3ecb115fd7cf575ccdd64f62a8f3edc635b087950e4ed4f3f781972bbfd.tar.gz
+
+  const downloader = new Aria2;
   let pack = await mongodb.Packages.findOne({_id: toObjectID(ctx.request.body._id)});
   let _gid;
   if (!pack) {
     return ctx.throw(400, 'pack not exists');
   }
 
+  await downloader.open();
+
   downloader.onDownloadStart = async (gid) => {
     _gid = gid;
     pack!.status = 'uploading';